Looks like a neagari Serissa Variegata (I'm not positive on that as the picture is... Well, not so good.)
Trouble is, it's sharing the space with some kind of mini bamboo, pebbles, bad soil, bad moss and a stone.
Serissas are very fussy, and they hate being moved, overly wet soil, overly dry soil lack of sunlight and excessive sunlight.
Good luck!